If you like hybrids and are used to a euro, then a rear handle plus hybrid might be a good choice. You have the added band stretch, since the mech is all in the back, and still similar aiming as with the euro. I could not get warm with true midhandles, but rear plus works very well.
You say you got a lot of time? Maybe more than cash? Build one!
With this little 55" i've gotten up to 50lbs amberjacks and 40lbs wahoo, 7.5mm flopper shaft. Very compact little gun that would do well in kelp.
http://www.spearboard.com/showthread.php?t=125117
This one is stricly for blue water, very long, would not be good in kelp
http://www.spearboard.com/showthread.php?t=162360