I share the same opinion as that guy, I like them both. I have alot more fun riding a 2 stroke but I suck on it now, when I go racing I usually ride a 450.
Now that my racing career is pretty much over Im not going to buy another new 4 stroke (and I sure as hell wont buy a used one), Ill build something like Charles's project YZ only a 250. Ive never ridden one of Erics 300's but man I want to now. $600 aint bad for all that work