Money vs Horsepower

IMO, depending on the power level you want, it's almost the case where the flat tappet can make the same power as a roller. You have to remember too - the samemods to fit springs have to be done for a solid cam that needs big springs too. (Lunatis all use dual springs and need the guides and spring seats cut unless you substitue another brand spring). So the only answer to your question, is your opinion after the engine runs. I don;t build a lot of roller cam engines - just because of the cost.. because I can get most "normal" power levels reliably without a roller.