Your very welcome @kishan.R 

To start for gaming I would say Alienware.

And for business I would think a Mobile Workstation.

Try posting a new question for others to give some personal feedback.

Best regards and good luck,

U2

Well, I had a feeling it would be the case but i wanted to get confirmatio from someone with better knowledge at this. Thanks. On that note, if i were to buy a laptop whose gpu can be changed with time, which specification should i look for? I now know that i atleast have to select one which does not have its gpu classified as "discrete". Is there any other specification that i should look for while buying one which allows me to upgrade its gpu from time to time?

There's only one Alienware system with a moderately upgradeable GPU - the Area 51m R2.  And that uses a proprietary GPU, so you're limited to what Dell offers in the way of upgrades (which in turn is limited).  A couple of the 7000 series Precision workstations also have replaceable GPUs, but the current and immediately past models also use the DGFF proprietary card format, which will limit upgradeability.

If you want a notebook with a truly upgradeable, standard MXM GPU format, one of the sole remaining options is a Clevo-built large-chassis gaming/workstation system. These are sold by "boutique" custom builders - Sager, AVA, Falcon Northwest, OriginPC, Xotic PC and a host of others.  They're shipped out as "whitebooks" without branding and the assembly house assembles to order, sometimes even offering custom painting of the chassis, wraps, etc. They're the only remaining, really upgradeable game in town.  These are not $1,000 systems -- they're high end systems.  There's nothing in the price range of a Vostro with an upgradeable GPU.

@U2CAMEB4ME​ I want to use my 3590 for video editing but it struggles with it, is there no way to increase performance somehow?

@NelspruitSeeker​ You can upgrade it's cpu to intel i5 10G or intel i7 10G. It will only support these two.You can also upgrade your RAM but it will only recognize upto 16 GB. If you want, there is bunch of options for storage too. You can visit Kingston or Crucial official website for more informations.