Well, of the maps you listed that don't come with OA, most are CPMA maps.
You could go to
http://www.promode.org/ and download their CPMA map collection.
Lots of nice ones in there, including some of the ones you already have. The maps
in that collection have the virtue of having gone through a lot of play-testing
for their intended game type. They'll have a 'feel' like the ones you already have
expressed a preference for. Most CPMA maps play fine under vanilla OA,
but others will be more suited for CPMA's 'juiced-up' game physics.
http://lvl-world.com/ also has some map packs that might interest you. Look for
"Cream Off the Top" and "The Top Peg". There will be some overlap with the CPMA
map pack.
Get the above and you'll have three 'best of' sets of tourney/dm maps. They should
keep you busy for a while. :-)
