Friends I want suggestion that

I brought new system with

G31 mother board, intel core2duo processor, 4gb ram, 250gb hard disk

Iam regular reader of Linux for you magazine and they are distributing every month one Linux Distro. Now i decided that i want to evaluate on my own each and every distro with full features like 3d, network and each its features.

So, what my problem is i want a solution that which should not intercept my daily using applications i.e my regular operating system and do this R&D what should i do.

If iam going for virtual OS these applications are not supporting the resolution, 3d support. (Correct me)

If iam triple booting iam going to do some times it is affecting my other operating system which iam regularly using whether i.e Opensuse11.1 or Windows XP

So what is the best solution for doing this type R&D checking multiple OS's features without affecting regular one in any means.

There are really only two ways with the restrictions you have stated - either go with a virtual OS (and yes, some effects may be turned off or inaccessible) or buy a second hard drive to put alternate OSes on. Actually, a third way would be to restrict yourself to distros which have a live CD option - that way you don't need to touch your current systems at all.