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I'm looking to buy a new desktop PC (definitely PC - although I like Macs as much as PCs, for a number of pragmatic reasons this one has to be a PC, and also not an all-in-one). What is current thinking on specs? My photo workflow mainly involves Lightroom, but I also use Photoshop and various plugins. While working on images, I usually have a considerable number of browser tabs, word docs, etc open at the same time. I already have a screen. In the past, I've always had machines custom-built in local shops. However, due to early problems with my current machine which the shop didn't resolve well, and the fact that such shops seem to be going out of business at a fast rate, I'll probably go with one of the mainstream brands (eg Lenovo, HP, Dell) this time to get a good solid warranty, despite them being more expensive than local builds. I'll spend whatever it takes to get a decent machine and am aiming for something reasonably future-proof without going over the top. I'd love to hear any helpful suggestions, recommendations and/or experiences, but I have some specific questions as well: Are there any pitfalls in buying mainstream brands? For example, do non-standard cases mean that future expansion is more difficult? And would adding an extra HDD or more memory (things I'm used to doing myself) invalidate the warranty anyway? I get the impression that it's a good idea to put the OS, programs and Lightroom catalogue plus previews on an SDD. But do people find 256GB enough, or is it better to go to the (considerable) expense of 512GB? More RAM is better, I know, and I'm thinking of getting at least 24GB, but does the law of diminishing returns kick in beyond that? Is there a noticeable difference between, say 24GB and 32GB? Many thanks in advance!! David.