The Amperex 6922 PQ is a VERY nice tube. They should last you 10,000 hrs. If you want to try tube rolling inexpensively, you can buy used but test as new tubes on ebay for a fraction of NOS. There are several sellers with lots of positive feedback.
For used speaker cabling and i/cs, you can try usedcables.com, and try with return privledges or pay less to buy direct on this site and re-sell. DH Labs T-14 and Q-10 are inexpensive, decent speaker cables. You can also get older MIT MH-750 or T2 for a pretty good price, and Audio Advisor usually has Audioquest closeouts heavily discounted.
Have Fun