When it comes to custom paint jobs, 8BA has you covered. A backlit DMG w/ screen cover, buttons, prosound mod, and paint is
easily worth what they're asking for. Just keep in mind that their selling point is the paintjob (which, from what I've heard, is very good).
If you're up for some DIY and don't want to include any mods, you can build a pretty rad unit on your own without having it painted.
Here's a walkthrough I made awhile back.
Search around on
Kitsch-bent and
asmretro for parts you think look cool. Those ASM transparent red shells. *_*
Modding will require soldering, cutting, and drilling. It's only getting easier, though.
If you do find yourself interested in LSDJ then you should check it out. IIRC it's $2 donationware and can be very easily emulated. Emulate it first, then buy a cart to flash it to if you like it. Everyone's favorite bootleg Chinese cartridges can be pricey ($40).
From what I know so far:
Game Boy Classic (DMG) - Slower processor, but a good, bassy sound.
Game Boy Color - Faster processor, but less bassy sound apparently. Speaker upgrades and such can be bought for it as well.
GBA & GBASP are the fastest but have the worst speakers. probably not a likely candidate for LSDJ.
Don't worry about processing speed. I've only encountered
minor lag maybe once or twice over the course of several years. What you do want to worry about is sound.
The most popular chipping unit is the DMG. It has that classic warm and bassy sound that we've all come to love, and when it's prosounded, it can't be beaten.
The AGB is unusable with LSDJ; navigating the software requires maneuvers that are not possible with its button layout.
My stereotypes:
DMG = classic, bassy, warm
MGB = background noise
CGB = static and background noise
AGB = unusable
AGS = cold, spacey, needs an adapter to record
OXY = bastard child that nobody ever loved
Check out this link if you want a more in-depth explanation.