You asked for an opinion.
If you need a JP engine after racing for 6 month, then for Pete's sake go with the 5 port.
I would probably even recommend a NovaMax 5 port, it's even more expensive.
If I had to chosse an engine for you, I would pick the Mugen MT12, lot's of low end and it costs anywhere from 139 to 169.
Just my $0.02