I would mainly go 4 miromiric's sugestion...
Remind me which speakers u have... Alesis M1 Mk2 right...?
there is no prob getting' em close 2 the wall just cover th ports on each...
I guess I would draw out a good Mic (get a m8 2 lend ya one of them mf expensive 1s).... set ti up where yer ears would b. Now get wavelab, Sx, what ever play about 1 minute of whitenoise while recording what u get on the mic (which is placed where yer ear generally are) 2 another track...
Try this for 3 or 4 of the different placings on the room.... get a spectral analiser... and check which is closer 2 the linear reprod....
Probably none will but u can check which "room eq" suits u best!!
Hope this helps...
I'm betting on the side wall with yer back 2 the chimney.
Z