I've owned a Loomis for around 4 or 5 years and I've always loved how it sounded. Similarly, I've owned a C7 Hellraiser for around 1 year longer than I've had the Loomis, and I've always enjoyed it, too.
I bought the Loomis used and it had some SD blackouts in it - something I thought I wanted. The clarity of the guitar in general prompted me to swap the 81-7 and 60-7 out of my hellraiser and put blackouts in it. Soon after doing so, I put the EMGs back in it, and then got rid of the blackouts in my Loomis for a set of 707s again.
I don't mind the 707s at all. The ash is a brighter wood than mahogany so the darkness and sort of hollow sound of the 707s is great for what I do, and it helps give the guitar a very percussive quality and really thumps when I play it hard. I find the somewhat fizzy highs can really help me cut through a band situation, and help a tone cut through in a recording situation, but honestly, I'm nowhere near as experienced with the recording stuff as many of you here.
Both of my schecters are running at 18v and it certainly adds a little to the dynamics, and opens the guitars up in a way that I enjoy and suits the music I play very well. As has been said a lot by people in here, though, when it comes to articulation, definition, and overall dynamics, a lot of it has to do with your hands, particularly in your muting and pick attack styles. Muting the strings a certain way can really make them thump.
For what it's worth, I've regularly run both of my schecters through any combination of the following...3 channel dual recto, 6505+, 1960a cab, mesa traditional cab. ALWAYS with an ISP Decimator and a ZW-44 overdrive pedal (although I recently sold the 6505+ and 1960a cab).
Because mesas are kind of weird amps to EQ to begin with, I found the boost absolutely essential, so I could turn the gain down on the amp. There is a fine line between enough gain to make the guitar sing and thump the way you want it to, and having far too much fizz and no definition. The presence knob on channel 2 while in modern/bold/diodes can really make a difference to how the guitar sounds, and it's a control I frequently play with when going between guitars.
I'll be tracking for my band's album in the coming months and I'm considering swapping the 81-7 out of my hellraiser for a 707 in the bridge of my Loomis, just to see how it sounds. Part of me thinks it'll be great because the extra definition could really come in handy for death metal, but I think there is every chance it could end up being too bright, and when recording, it's easy to get away with a darker tone and let the mix speak for itself, than it is to cut through in a live situation (in my opinion).
Anyway, for those interested, here is a song I recorded with my Loomis a few years ago. It's the last song I wrote for my band and it'll be getting recorded on the album. Both tracks are the same song with the same tracks, but they have different recabinet settings. I was thinking very much DHIADW when I recorded these tones, and funnily enough, the darker, less fizzy tone that I think is more towards the DHIADW sound is actually a recto cab in recabinet 3. Anyway, have a bit of a listen. I'm not engineer at all and it's certainly not perfect, but I think the tone is quite good for someone with my lack of experience.
https://dl.dropboxusercontent.com/u/1044020/Epic recto win 3.mp3
https://dl.dropboxusercontent.com/u/1044020/Epic recto win 4.mp3