Hey, no problem ! I myself am quite curious about the burr-brown "upgrade". I know Burr-Brown is a company that makes chips, so, there is a chance that they don't only make DACs, but also analogue chips, maybe for crossover circuits, or just preamp signals and whatnot... Who knows ?
I'll try contacting Mr. Mantz and checking out the prices on his amps. The sad part is that he doesn't have anything powerful enough for the subs though...
Anyways, I've been looking around at a bunch of 4ch amps, and I've yet to come to any conclusion. (I'm a very undecisive when it comes to picking stuff... I generaly go with what I get a deal on... lol).
So, here goes :
Kenwood Excelon KAC-X40 : Not too sure about the SQ of this amp. I've been told that the Excelon headunits were good... but dunno about the amps.
Audison LRX 4.5 No doubt on the quality of this one, but pricey.
Elemental Designs Nine.4 Cheap... as in inexpensive.... but what about the quality ?
Soundstream TRA-680.4 The size... these amps are huge. I like them... but... dang...
DLS amps They've been recommended to me, but I don't know them much. Nor do I know they prices
Boston Accoustics GT-40 I'm not too familiar with it. I've never listened to them, but I've heard good of Boston amps.
Eclipse EA4000 Kinda like the Kenwood Excelon... good headunits, but amps ? Dunno ?
Focal FP4.75 Pricey...
JBL PX300.4 VERY powerful for what needs to be amplified... but, the rest is right
JL 300/4V2 Pricey
Memphis 16MCA-2004 Not very familiar with Memphis amps
Nakamichi PA1004 Good reputation...
Polk Audio C400.4 Can probably still get a pretty good deal on this one, and seems to be well reviewed. But, I remain skeptical.
PPI A600/4 Heard very good things of PPI.
Ideally, I think I'd go with a combo of audison amps... I'd have to see what the financing would be on those though... lol