ORIGINAL: F106A

Hi everyone,
I'm thinking of getting a 1/5 L-39 and not sure what engine to use. Checking the past threads, it seems they're flying with 25, 30 and 35# engines, so I'm not sure what to use. I fly off grass most of the time, so I think I'll need to be more towards the high end.
My SimJet 2300 has run like a clock for the last three years and I'm thinking of either the 3000 or the Nexus. I was wondering if anyone can post their experience with either of these two engines. The Eagle and Rhino look like good engines also and people seem to be happy with them and was wondering if anyone has used either one of these engines in an L-39.
BRG,
Jon