I need internet access particularly to run metatrader 4 mobile and would love a large screen phone or pda that?

If price is of no concern to u then I suggest u buy HTC's Touch HD. It's got a fantastic 3.8" widescreen display, myriad connectivity options & supports 3G networks. Alternatively if u are tied for cash, check out HTC's Touch2 which runs on the newest Windows Mobile OS (Windows Mobile 6.5 Professional), has an ample 2.8" display & also supports HSDPA like the Touch HD. Since the Metatrader 4 mobile only runs on the Windows Mobile OS ur options are rather limited.