Heli Bars are aprox $300. That is a lot cheaper than the Speigler unit.
I hava 2 sets of Helis. The first set went on my 929 a couple of seasons ago. Kicked myself for waiting so long. Those were the "old style". I cut aprox 1/2 inch off both ends, redrilled. They're still an inch or so wider than stock. No biggie.
I bought a used 600RR off of EBay this fall. An hour or 2 after I won the auction, I was on the phone ordering another set. Again, I really like em on the 6. The set on the 6 is one piece CNC machined aluminum. No one will ever know they're not stock. They look as good or better than the Honda parts. They fit perfect.
I don't know which Gixer you have, or the type of riding you do, but for me, after the HeliBars, A CBR is nearly the perfect sport/street bike.
I have a 919 with aftermarket bars that are 2" lower than stock, and there are still times that they're a little too hi.
It's a lot easier th make a sportbike more comfortable than what it is to take a comfy bike into a sportbike.