Atty vendors are akin to juice vendors, in my opinion. Everyone has their own individual preferences. I might love Cisco attys, but my last couple of orders were for discounted attys from Boge and Joye. The Boge attys didn't impress me enough to reorder and the Joye attys (306's) are due to arrive in the mail any day now. IKV attys are ok. I like his 801 and 901 attys. The one LR 510 from IKV that I tried didn't last very long, but performed great during it's short life span.
I don't have the funds to try all the "premium" attys all at once. I order what I need, get the best use I can out of them, then buy more.
If Cisco attys go on sale the next time I'm down to 2 or 3 working attys, he might get an order from me.
Same thing with Issac's new Cannon attys. The concept appeals to me, but I don't have a need to order right now.
And when attys totally piss me off, and they do from time to time, I have 60+ brand new LR Boge cartos on standby.