Thinking to launch my personal web site and it requires not so much resources:
40GB - space; 600GB - bandwidth; Linux
I have found GTHost.com - their vps hosting solutions can be suitable for me.
Is their vps hosting service reliable? or any better deals?

There are some options available on the net that can provide you with the tools and information you need when formulating your hosting decisions.

VPS deals from hostingsource.com are the best to sign up with.
Their service and prices are good, plus my websites are also running well and fast. For me, they are very good hosting sites for low budget guy like me.

I have been with GTHost.com Paris VPS for a long time. While they don't have much variety in their packages (they only have two...they had just the one when I first signed up so they are improving), what they do offer is outstanding. Their tech support is extremely fast. I have gotten responses to my e-mails not even 5 minutes later. Consistently reliable performance every single day.