Unless you are going to continually change out parts, I would think that flashing with Dano's will be the best bang for your buck. Keep an eye on the forums and on ebay, Ive seen fellas get some great deals on full exhausts that are close to the cost of a slip-on or even cheaper.
2015 CBR1000RR YR-250
1999 ZRX1100 Eddie Lawson
1984 Goldwing Aspencade (WIP bought after a light deer smashing)
1983 LTD550 (WIP cafe project for friends to ride)