Now there's something I know a thing or two about.....
Pedals are a
feel thing, go into a music store that stocks them all and try them all out, you might be suprised with the outcome and walk out of the door with a cheapie that works for you
Speed also comes from the foot in combination WITH the pedals, not so much the pedals.
However, as far as build goes and physics, I swear by direct drive pedals. I use Axis A longboards. I've had them since 2004 and had no major problems and they've had quite a lot of (ab)use to resist. Only one nut got loose and had to get fixed but that's it. I've played all other pedals out there (except for the new Trick Detonators and the new Gibraltars with the holes in the pedalboards) and here's my list as far as MY personal preference to playability:
1: Axis A Longboards, they just feel amazingly smooth, very solid construction, you just know they've put a lot of thought in the design but theres still room for improvement. As far as the technical claims regarding problems with the equipment, theres a few components that Axis should improve one being the drive shaft on their double pedals. Its the most smoothest in town and has a great feel but their NON durability is notorious, I've seen guys strip these by 2 in a year.
2: Pearl Eliminator, these pedals might feel a bit flimsy at first but they're really solid. I think the biggest plus about these is that they have interchangeable cams which means you can change their feel 1,2,3. The fact you change the belt to chain makes it another plus. They just feel fairly light and if I were on a smaller budget and didnt have Axis I would seriously check these out... AND BUILD SOME LONGBOARDS FOR IT
3: DW5000, not kidding. These might be notorious for their footboard breaks but the design is a lovechild from the old Camco pedals who were notorious for their smooth feeling (especially in that era when all pedals had freaky designs and not very fast playability) and squeeky springs
I've had the chance to play these pedals a couple times and I was flying high. I think a longboard version with a high hingle like the Axis' would be excellent. They have one longboardish type of model but thats more like a Ludwig Speedking
4: Iron Cobra, belt version. I have the powerglide chains and they've served me well for many years. These are RELYABLE pedals, meaning you can beat the living crap out of them and they'll probably still stand. Not that anyone deliberately would do that, except for your ex girlfriends.... I've modded my IC double pedal 2 singles and they're working fine. Adjustability on these babies is fine too. Note, if you're buying these get the heavy duty springs for them as the stock springs are a little flimsy.
Now, I could go on into the 10's and 20's regarding other pedals but I think I covered the main 4 options I would suggest.
Theres a new kid on the block though, Trick Detonators who basically have resolved most of the Axis problems people whine about (for instance: independent footboard height without adjusting beater angle) and introduced new adjustability. Same with the Axis pedals ,these aren't made for everyone especially I've you've been used to pedals that offer great resistance during the stroke like IC's, for instance. Whether these pedals work for you or not is a matter of trying out for yourself, some people can work with these from day one, I had to adjust to them for the better part of a year.
Technically, Axis and Trick's are kings and the others follow. ALUMINIUM CNC FOR THE W1N FUCK DIE CASTS PARTS!!!
In case you were wondering who uses what heres a list:
Axis: Derek Roddy, Jan Axel "Hellhammer" Von Blomberg
Trick: John Lonstreth, Tony Laureano
DW5000: I have no idea to be honest these are mainly for mainstream players
IC: Nils Fjellstrom, Dave Lombardo and some others I cant think of right now
Eliminators belt: Flo Mounier
Underline message: pedals are like sticks, what works for others might not work for you. Also, try to ditch the 'best for metal' line and you'll sound 10x as mature. Theres no such thing as best for all,
only best for you.