Looking for new computer advice

Just to add a Photoshop perspective. RAM isn't as important as most perople think. It's much more critical to have an efficient scratch disk setup. If you work with large files you never have enough RAM anyway, and most of the activity happens in the scratch disk. That's the bottleneck.

Traditionally you wanted a lot of RAM to speed things up. That was with spinning scratch disks. Today, with the new PCI-e M.2 SSDs, speed isn't really a concern - the scratch disk is for all practical purposes as fast as RAM. Just make sure you have enough space, and Photoshop can handle virtually anything.

The funny thing is, sometimes you can't tell what performance you will get from different computers. But, you haven't stated what is slow currently, we need specifics, we need details, exactly what actions are slow now in LR.

You also haven't stated the screen sizes (in pixels, not inches) that you have now and are considering getting. 4K and larger monitors can be a serious source of slowdowns, especially if you do a lot of brushing and/or a lot of spot healing.

In general, you want the fastest CPU you can afford, and these i5 processors don't strike me as being in that category. Also, in general, when manufacturer's pre-configure computers, it is because it has the hardware they want to sell, and while this hardware may be good for 99% of applications, Lightroom has its own requirements that manufacturer's really don't meet with their pre-configured computers. So, configure your own computer, get the fastest CPU you can afford, get a 1920x1080 monitor and then you don't need to spend on a high end GPU (or get a larger monitor and a high end GPU). You don't need an SSD for your photos, you might want an SSD for your catalog file (but not the photos), although I have never felt speed issues with my catalog on a standard non-SSD hard disk.