I bet you will make more power with a nice h/c/i setup than going with just a stroker bottomend. It will really increase your volumetric efficiency...rather than "hurt" it. Now if your bottom end is in need of a rebuild, go with the stroked bottomend.
wat i think im going to do is just a 306 w/forged internals and h/c/i, for now and when i get the money in the future to do a stroker i'll stroke it and a buy a new block
why not look into doing a long rod 306? ive never spec'd it out but ive always wanted to build one. probably gonna need custom rods and/or pistons but that extra millisecond of piston dwell at the top of the compression stroke will make for some good power