- Any current motherboard should work up to at least 16 GB. Check the specs to see if it supports 32 GB or even more if you think you need more.
- A 1 TB SSD is quite expensive. Consider a laptop that has a smaller SSD and an additional HDD for storage.
- I doubt if you can find any laptop preconfigured with RHEL. In that case, you have to install it yourself, but as a seasoned developer you won't find that difficult. It's up to you to compare prices.
- RHEL certified means that it can you can install RHEL on it
I am a novice when it comes to hardware world. If this is not the appropriate site, I request the moderators to redirect me to the correct one and close this question
.
My objectives pertaining to the laptop:
Configuration to suit development needs:
16-32 GB RAM
1+TB SSD
i7/AMD equivalent
Motherboard that can handle all the above
Possibility to add RAM, in the future
Only ONE os - RHEL(enterprise or developer, I haven't decided). Dell laptops come loaded with Ubuntu and are 'RHEL certified'. I didn't understand what they meant, also, I want only RHEL, to begin with.
What would save a 'considerable' amount - buying from the provider with above features preconfigured or simply buy the hardware without OS(bare metal) and then install RHEL by myself? If there isn't much difference, I would prefer to buy from the provider.

Chowhound
Comic Vine
GameFAQs
GameSpot
Giant Bomb
TechRepublic