Avid or rme pres?? Seriously? Piss off .
There's a great divide between what you get built in to an interface and classics like the neve or api.
Granted however on a single track basis the difference is not huge, but its another 10%, which along with everything else can help elevate the quality of your recordings. Stacked up over a record the difference is noticeable.
A lunch box is a good shout as a way of slowly adding to your arsenal without spending too much each time.
However that being said, you don't necessarily need a huge variety of pres, just good quality ones. Heck gimme a desk full of neves and I ain't gonna complain that I want an api!
Depends what sound you want. Api is quite fast and quick sounding so is great on some drums. Especially love it on toms.
It's not without its shortcomings though.
You pretty much always need the pad engaged when recording anything even vaguely loud, and the pad seems to attenuate the high end a little too.
Can't go wrong with neve. Fat fat fat, although over a record that fatness can become mud if you aren't careful.
Great river pre is magical.
Tg2 is dark gritty, loads of character
Ua610 Is kinda dark and slow, nice on bass, or sources where the high end needs raining in
Shadow hills is a nice versatile pre. Lots of character
Isa428's sound like cheap pres that are built
Into an interface.
Manleys are phenomenal. Just beautiful.
Audients are just the right amount of clean.
Millennia are crazy clean. So detailed.
That's all I can think of for now.