Well, i think you should use both. i use both and i'm very happy with my decision.

Why do i use both?
Well, my preference is linux, but i play games. Games that don't run on linux and i need windows. Another reason is that i am a Vb programmer, an addict one, and i don't want to learn another language compatible with linux before i mastered vb.

How do i use both?
Personally i use grub to change between OS, but there are also another programs for that matter. (ie. lilo)

~
Greetz
João Lopes

Well I would choose linux in my eyes. It is open source so bugs and errors get fixed very quickly. Most of the programs are free and can achieve the same results as applications for windows that cost. Now there are many distros for linux, and they break down into 2 main GUIs (Graphical User Interfaces). These are Gnome and KDE.

The best one of these is Gnome. It is easy to use and much simple. However if you are wanting your computer to look more like XP with the start button and all, choose KDE. Different programs work on different GUIs, so choose wisely, however there is normally a port between the 2.

Now also there is different Distros. If you are wanting a simple one, use Ubuntu for Gnome and Kbuntu for KDE. These are free on the internet, just google it, not like Microsoft who charge a lot of money.

Linux can run on the lowest spec computers so it makes it very good for that old PC in the attic for instance.

Now if you want effects like Windows Vista you can use a free program called Compiz Fusion or another program called Beryl. I will be making a tutorial on this very shortly.

For music I use Limewire. They have released a version for Linux, so that works very well. Or you could use Frostwire, which is free and works well too. The choice is yours.

will thanks alot

and also

2. iMesh -> amule (so much faster)

i don't know the rest

but only one soft i cant find replace for it so far is roboform

i fund few but non of them is flexible and easy to use like it

linux always have better technology because there are millions of linux developers. and this caused minor bugs always.
anyway, linux rocks!