I've seen this box mod around. Is it spring loaded?
I have one and it's pretty nice but no, it's not spring loaded. That said, I've not had any problem with my atomizers--both my KFLs work well as do my RDAs. I have no basis to compare the Cloupor to the istick as don't have an istick.
You're going to have to bump up to a serious box mod to get a nice spring-loaded connector or you're going to have to wait a bit. I'd counsel on waiting a bit. There should be cheaper, smaller regulated mods appearing following the success of the istick and the high-end box mod wars.
If you want to demo the hana-style clones, you should be able to pick up a cloupor box for around $60. Check out Mount Baker Vapor and use a 10% off code w/free shipping. It's shorter but fatter than the MVP. I like mine a lot. Issues are negligible.
If you want something smaller, I'd point you in the direction of the KSD hana mini clones on FocalEcig at $40 w/free shipping. The KSD clones have a better reputation than the Fasttech minis as they've been circulating around Europe for some time and feature a replaceable 18490 battery.
Now, on the other hand, the Fasttech hana clones made by hotcig have an adjustible 510 pin (not spring loaded but screwable), yet the quality control and chip performance have not been so great. Also the FT minis feature an on-board LiPo battery back which is difficult to replace. Ordering a hotcig/Fasttech clone is like playing the lottery. Fasttech does offer 6 month warranty though.