Which prop to get?

Wondering what brand/type of prop to get for my boat. I think a 4 blade 19 pitch would be the best for my setup, but wondering if there is much difference between brands?

Something like this Solas?
http://cgi.ebay.com/ebaymotors/ws/eBayISAPI.dll?ViewItem&rd=1&item=4551695575&catego ry=26456

or this one:
http://cgi.ebay.com/ebaymotors/ws/eBayISAPI.dll?ViewItem&rd=1&item=4551609835&catego ry=26456

Or I was looking at this PT prop:

http://www.ptprop.com/catalog/product_info.php?cPath=55_56_67&products_id=411


Anybody have any ideas?

The boat is a 2005 Maxum I/O, Mercruiser Alpha I 3.0L. It actually pulls pretty good now and has a decent wake, good enough for us beginners.

Thanks!