outta curiosity what do you prefer balsa or styrofoam for 1600rpm electric boats?

I use cellfoam 88.

o sweet i need some of that.where u get it hobby shop or hardware store lol

[link=http://www.midwestproducts.com/catalog_sa1.asp?sa1_id=16&srch_grp_id=8&sa2_id=21]Cellfoam 88[/link]

My LHS has it in stock but the link will give you a start. It's great stuff.

Buy yourself some blue foam at Lowes or Homedepot it sends quite well and you get a big piece to work on many projects at a very reasonable price

OR .....
if you want it a little tougher ...
make it balso OVER foam