The best advise I got when first starting out was to get my tempo. Distance off the tee will follow providing you make a good connection with the ball. Take your time with your swing and even take a 3/4 back swing to start.
I played a set of Lind Sniper irons which were a copy of the Callaway X18 I think.
I used them for about 6 years with no complaints at all. I thought for how good I was at the time and the price I was willing to pay that they were pretty good.
I have upgraded my irons to the Wilson CI11 now.