The AGWS units make GSdx crawl.It will be bad when these are on screen but you'll get good speeds once you get control of the actual characters instead of their mechs on screen.
Dralor,Xenosaga 1 works fine in 0.9.5 and Playground and in fact I just finished it yesterday on 0.9.5 SVN 389 (fastest pcsx2 build for this game )
I dont know xenosaga2 but i had tried xenosaga episode 3. Best gsdx plugin i tried is gsdx 0.1.7 in directx.10 mode, perhaps you can try that plugin4.
Notebook ASUS A43TA|CPU AMD Llano APU A6-3400m Triple core (1 core disable) OC to 2.6+Ghz|GPU CF|HD 6520 400Mhz/667Mhz iGPU|HD6650M OC 780Mhz/985Mhz dGPU|RAM 8GB DDR3 1333|Windows 7 Ultimate Sp.1 x64 bit.
>> Emulation speed differs for each game. There will be some you can run fast easily, but others will simply require more powerfull hardware <<.