Could someone who speaks English as their first language tell me if my text is without any grammatical errors?

We welcome you as a guest from UK.

Here we offer top 3 full-featured personal web hosting packages. All but the third, can also be used for Business hosting. A personal website will include any non-commercial site, such as personal pages, forums, web blogs/wordpress, multimedia sites (video and music), etc. All Our recommended services are FrontPage/DreamWeaver compatible.

** Free credits to advertise your website with Yahoo and Google!**
An ad coupon gives you the opportunity to try out advertising on well-known search engines. You can advertise your website for free and get more traffic to your site.
All of our recommended web hosting services, except for the third, have established a partnership with the Google and Yahoo search engines to provide you with this special opportunity.

Q: Which of the 3 recommended services is more preferred?
A: Actually, it depends on what you're looking for. So if you ask us which service is more suitable for you we would answer: ... ..

Very well-written overall. I have corrected a few minor grammatical details. The only significant change I made is at the end of the last paragraph. Some of the changes I made are as follows: I changed "3" to "three" (numbers from 1-9 are usually written out). I removed the words "video and music" because they are redundant: the average user knows that multimedia includes video and music. You can see that I have made the invitation more detailed so that it sounds more professional and inviting.

We welcome you as a guest from the UK.

We offer three top, full-featured personal web hosting packages. All but the third can also be used for business hosting. (A personal website includes any non-commercial site, such as personal pages, forums, weblogs/wordpress, multimedia sites, etc.) All our recommended services are FrontPage/DreamWeaver compatible.

** Free credits to advertise your website with Yahoo and Google!**
An ad coupon gives you the opportunity to advertise on well-known search engines. You can advertise your website for free and get more traffic to your site.
All of our recommended web hosting services, except for the third service option, have established partnership with the Google and Yahoo search engines to provide you with this special opportunity.

Q: Which of the three recommended services is the most preferred?
A: Actually, it depends on what you're looking for. So if you let us know what your unique situation is, we will be happy to suggest the most appropriate option.

Looks pretty good, but here's a few changes you might want to make...

YOU CAN PUT "THE" INFRONT OF "UK":

We welcome you as a guest from the UK.

"TOP 3" SEEMS A LITTLE WEIRD TO ME, TRY MAYBE:

Here we offer 3 top, full-featured personal web hosting packages. All but the third, can also be used for Business hosting.

--OR--

Here we offer 3 great, full-featured personal web hosting packages. All but the third, can also be used for Business hosting.

COMMA BETWEEN "YOU" AND "WE":

A: Actually, it depends on what you're looking for. So if you ask us which service is more suitable for you, we would answer: ... ..

a guest from the UK.

Two of the three can also be used for business...

perfect. spot on