There is no choice outside of Android and IOS space but N900, N9 is there as well but lacks hardware kbd.

Personally, I didn't want to repeat buy n900 and did not wanted to spend a lot of money and the only other potential choice was Android and I bought a Huawei X3 for $99, it does everything that and expensive SGSII does, bit slow but doesn't bother, smaller screen but I use it as a hotspot for touchpad so no issues.