The 3x9 has been great, I run it on a Tikka T3 in .270 and it has never been an issue. Even crawling the scope in prone or goofy positions it has not bitten me at all. YMMV with a heavy kicker...
If I wanted a full 3x9 on my .35 Whelen the eye relief would not be an issue and I have never found myself thinking I needed more.
Sorry for the slight hijack. Was drying firing so I had it handy. The eye relief is enough that I can easily run the bolt all the way without smacking myself. Eye relief on the 5x20 is similar but I just had shoulder surgery and I cannot lift the pig that it rides on.