I havent heard any complaints about going with a thicker head gasket...

when I was doing research for my (now shit canned, but hopefully soon to be underway once i get another E-30) turbo e-30 project that is what everyone was saying they had done on theirs...

too much compression equals less boost which means less fun.

basically...

When you are adding boost to a car (no matter turbocharging, supercharging, ect . . .) the goals are to achieve the best delivery of boost into the engine and to make the engine strain as little as possible.  When you plan to force boost into an engine you actually make the engine run with a substantial amount less effort, so that when the extra pressure is added it gives more effect.  If the compression inside of the engine is already too high, when you force boost the engine will explode.  So the more boost and the more effect therefrom you desire to feel the less you want to make the engine work with each rev, thus lowering the compression makes more effective use of turbo power.
What most people do to accomplish this is install a thick head gasket (usually copper).  This decreases the strain on key points of the engine and makes the pistons make a looser connection with the top of the block (thus making easier travel smoother).  Fortunatly, the e-tune block already runs a 9.0:1 compression ratio (most turbo engines run about 8.5:1) instead of the i-tune which runs 9.5:1; so really one really good modification to the engine, will make me safe to run about 10psi of boost.
The usual concept for a 325e stroker is to take an e-tune block (except super-eta [1988]) and:
replace the aluminum crank with the drop-forged counter-balanced one from a 524td
replace the camshaft
replace the valve-springs with those of a 528e
replace the pistons (extreame proformance)
replace the head gasket (extreame proformance)

but does anyone suggest anything else to make the engine flower smoother easier?