J-Binks,
I'm not a fan of the 602, I think its treble is too sharp and the mid-bass too bloated, so I'm not sure if these recommendations will help you:
PSB Stratus Mini (used or "blemished" (talk to Kevin and he'll get you one where that blemish will be a slight scratch on the back cabinet) from Upscale Audio) - Needs lots of power to open up, slightly thick sound but in my opinion the best all around speaker PSB makes. Bass response is what you're looking for, treble is really good and not too sharp granted the components behind aren't tipped up extension wise.
Dynaudio Audience 52 - Real linear, also needs lots of power but not as demanding as the Stratus Mini. Gets speed pretty well for a lower/mid priced speaker, but if you under power them they sound stuffy.
Silverline SR12 (used) - Watch placement since they're picky, too high and they have a big suckout at the lower treble, too low and they smear. Get them right and they sing - nice, clean, lots of seperation and image really well. Transparent enough to be a speaker you can build around, but its limitations in soundstage size (well placed but too small and won't fill a large room) keep it from being great.
norh 6.0 - Really good speaker, doesn't go real deep but bass has enough impact where you know its trying. Detail is clear but tone sounds a little too sweet for its own good, top end is pleasant but not real linear. I have a problem with its soundstage, it creates a space for performers thats entirely its own, the image of each performer is out of focus. There isn't a bookshelf these will fit into
good luck,
carlo.
Add-on: Tell your friend to budget for a good pair of stands, preferrably with hollow tubing/innards to help with resonance issues. There's also a lot of DIY ideas on AA if so inclined. Also head over to their FAQ and read the speaker placement guides, by far the best time you can invest when dealing with speakers.