bass traps..which wall first

what are your thoughts on accoustical solutions traps up front (the 4' tall foam ones) and Aurelen Lenrd bass traps in rear (2' tall)

Auralex Lenrd traps in the front and rear corners, each 2 foot tall stacked in threes to create 6 foot stacks in the corners, works very well for me. A rug and some furniture and I'm done. I wouldn't want to lose some of the remaining ambience in the room.

I have some rock wool (8lb) four inches thick on the diagonal of the corners behind the speakers. I could not believe the difference it made. I highly reccomend it, especially if you have squarish room dimensions. I haven't personally tried all four corners, but if I could I would definitely do that as well. The other thing to think about is the first reflection from the ceiling. If you have speakers with good dispersion in the tweeter, you should put some damping in high frequencies on the ceiling, in my opinion. Ambience is good, first reflections are bad, again in my opinion.

what are your thoughts on accoustical solutions traps up front (the 4' tall foam ones) and Aurelen Lenrd bass traps in rear (2' tall)

I'd be inclinded to go for the MEGA LENRD's (or equivalent size) if you plan only a total of 12 linear feet of coverage in the corners (4' + 4' + 2' + 2')

shadorne,
im unfamiliar with the MEGA product...how does it differ from regular lenrd's?. would 2 pr of regular lenrds be better? i just not a fan of the "look" of any product in the corners..so i fugured the 2' ones would be best solution