Change r22 system to 410 equipment before they sell out or get 454b

Currently have a R22 system i have to top off every year because the leak in the evap is too hard to get to (tried to fix already). Not a huge leak but around .1/2lb i have to add every year just to get my pressures and superheat right. Im in a dilemma right now and i need some help choosing between either 1. Ride out the 22 system till it takes a dump (i have R22 on hand and wont run out anytime soon) then if it takes a dump get the new r454b equipment. I got a quote for a weathermaker condenser for 1800 and didnt ask for coil price because of the outrageous price of a condenser itself lol. 2.get 410a equipment before they run out in summer, my supply house has some still left in stock but will most likely sell out by end of April/May, Heil or sure-comfort equipment and i got a quote for 1650 for a sure comfort condenser and coil. Gotta make the decision between the next few weeks if i want 410 a equipment before they sell out. Ive heard from buddy's at resi shops there buying out alot of 410a equipment. I mainly do commercial but started as a residential installer so i can still bang out a nice install