You coula also consider the novarossi limited edition 3 port. Very capable motor and only $150. Buy a $50 dynamite 086 pipe for it and you will be set. thats a $200 combo that will impress you. Then you can save the extra money to get ceramic bearings and a new connecting rod for it and it should last 10+ gallons. Or you could use the extra money to get it modded and have a real screamer. I personally love my os v-spec and think it is one of the most powerful engines out there but I do question longevity. I don't question it enough to not buy a speed lol. Thats next year's motor. If you decide to go with os take a look at the new mugen ninja made by os. It is basically a 5 port v-spec with a speed like coated crankshaft. I would buy the ninja over the v-spec. that $15 difference could mean alot in longevity(because of the coated crank and better con rod). Plus it is supposed to be more powerful.
novarossi
http://www.amainhobbies.com/product_...ducts_id/31073
Pipe for nova
http://www.amainhobbies.com/product_...oducts_id/9007
OS v-spec
http://www.amainhobbies.com/product_...oducts_id/6008
Mugen jx21 ninja
http://www.amainhobbies.com/product_...ducts_id/23465