If you have a lot of experience you can sort out negatives on a light table and print them without making any test strips.
If you like Tri-X (400) in Diafine E.I. 800 maybe try Kodak 5222 Double-X as well at E.I. 640.
Our price for Tri-X (400) 135-36 is Eur. 5,25 and bulk 30,5m/100ft Eur. 140,- so then an XX reel 122m/400ft is not a bad idea.
On the other hand: Fomapan and Rollei is relative cheap: Eur. 3,25 resp. Eur. 4,25. About Fuji Acros 100 135-36: Eur. 6,75. So you see big differences in film prices. 🙂
BTW Euro versus $ is 1: 1,1 at the moment.