Rumble 200, just in case you start playing with a drummer you won't have to upgrade. Also the rumble 100 does not allow an extension cabinet but the 200 does. Not sure if they ship to Europe, but another option on the cheap is the acoustic b100mkII on
musicians friend for only $159 shipped (at least in USA). Like the rumble 100 it cannot add an extension cabinet, but it is a 15 instead of a 12, half the price, but also twice the weight.
Since you said price was no issue, the rumble 200 is $399, 140w as is into a 15", and 200w with an 8 ohm speaker cab added, which can cover just about anything shy of super drop tuned metal band with dual 100w tube guitar stacks. Then you'd want the 500 with a 4x10 underneath.
Personally I use my 200 with either a 1x10 or 2x10. Note that the rumble combo weighs about as much as the relatively high end swr 1x10, and a little less than the less beefy built ampeg 210 from the micro CL stack (also another option if you like the cool factor and small footprint of the vertical 210 mini svt stack, but less power and tonal control)
The 200 is 30something pounds, definitely under 40. Super light.
What is more important is the range of tones and settings available, same as rumble 40 and 100 but with a bigger speaker, more power, and a speaker jack for expansion later if you need it. Still small enough to not be obnoxious in the corner of the studio.