Hi Bodisatwa,
In fact, for me that's done, I bought from RED BARON a SUZUKI DRZ 400 S looking brand new for 240.000 TBH coming with new Dunlop Cross tires (Japan made) and few other accessories I source myself at DIRT SHOP.
For what I am looking for, I think the power is enough, as on an other hand I have the DUCATI S2R 1000 Monster t-o enjoy speed a bit more, but is it really necessary down here...
I know the model since years, that's a classic, should not be any surprise.
I would again recommand RED BARON I know their reliability and skills since years.
Being Thai managed, they belong to a Japanese RED BARON mother Company well established in Japan and they won't cheat as it would endanger the good reputation of their Group.