If you don't need portabilty, don't go for a laptop. As PushyDad has said, you get a better spec desktop than laptop for the same price.
An aditional bonus is that generally a desktop will last longer than a laptop - although there are obviously exceptions. There are other factors, but a major reason for this is that heat build up is less of an issue in a tower, with decent airflow, than it is in an inherently compact laptop.
Again, as PushyDad has mentioned, Dell are good value for money and in my experience (I do PC repair for a living) they are no worse than any other brand for reliability and are more durable than the really cheap makes...many of which are matched on price if you wait for a Dell online sale on the model you want.
Whatever make you choose you'll find lots of people claiming that they're rubbish and theirs "only lasted 13 months", but sadly (for you - less so for me more failures = more work!) that's simply a factor of the cheap components and poor build quality of PCs nowadays (gosh - I sound old!) Then again, you can buy 3 PCs for the price of the equivalently "top of the range" one of 7 or 8 years ago, so the savings have to have come from somewhere...sadly that "somewhere" is quality.
For what it's worth in our household we have a Dell desktop that is 6 years old and still going strong, a much newer HP desktop (2.5yrs ish) that has been nothing but trouble and has failed USB ports, new PSU and had its graphics card replaced once, too. We have/had two Acer netbooks (one died after 2 years, the other is working fine after 3.5yrs), 2x Dell laptops (both Vostros) that are 3.5 years and 1 year old, with the newer one being a replacement for one we got replaced just before the warranty ran out because it regularly reached CPU temperatures of 90-95C... We also have a Toshiba laptop of about 4 years old that is still limping along, and finally a 4 month old Lenovo laptop, so I am not some sort of Dell "fan" - I just see that they are usually better value than most other brands and are no worse for lifespan.