You didn't state your goals so all of my suggestions are bases on sound quality. They will get loud for 10's but you can't really get that loud with a pair of 10" speakers. All of the suggestions below will work with your box based on .65cf per driver.
2
Sounsplinter RL-i 10's - $322
2
TC Sounds TC-1000 10's - $350-$378 depending on voic coil configuration
2
ED 110v.2's - $350 ($240 with special discount)
2
ED 11Kv.2's - $230 ($130 with special discount)
2
Fi X 10's $218 shipped
2
Fi SSD 10's $358 shipped
These are smaller companies that will give you the best bang for your buck. TC Sounds builds for Eclipse, used to build for SVS (still supplies their Ultra driver) and provides drivers for many high end companies like Aerial Acoustics. Elemental Designs provides great subs as well. They are hand built at the ED shops in Iowa. I included both their reqular prices and special discounted prices that you can get if you are a member of their forum. Fi Car Audio is a start-up by Scott Atwell. Who is he you ask? He started Destijl Engineering that supplied speakers to SVS (PCi series) and Adire Audio (Brahma series) as well as selling their own models under the name Resonant Engineering. He recently sold his company but wanted to stay in the business on a smaller scale.
-Robert