Spier & Mackay Sizing Help!

Hi! I got some Spier gift cards for the holidays and want to grab a new suit before this boxing day sale ends, but I'm having trouble figuring out what size I should order.

I believe that I need a 40 in both the Core and Neo Cut, but I'm worried that the Regular will be too long, and the Short will be too short. The sleeve length on the Short is definitely closer to correct. I'm also unsure if the Slim or Contemporary would be better.

There's also the Tailored Fit on the Red Label suits, and I think I would need a 38R since those seem to be roomier and shorter.

What cut and size would you recommend? Thanks in advance!

My Measurements:
- Height: 5'8"
- Neck:" 16
- Chest: 39
- Waist: 35
- Sleeve: 33.25
- Shoulder: 18.5

Some example jackets:
Navy Pronto Uomo
- Size: 38 Short
- Pit to pit: 19.5
- Sleeves from shoulder seam: 24
- Shoulder seams across front: 18
- Across waist: 18.5
- Length from bottom of collar: 29.25

Brown Herringbone Polo Sportcoat
- Size: 42R (I've had this tailored at the waist and sleeves)
- Sleeves from shoulder seam 23.5
- Shoulder seams across front 18.5
- Across waist 18
- Length from collar 29.25 (I don't know how this can be the same length as above. The jacket is noticeably longer!)

J Crew Thompson Blazer, Navy Donegal
- Size: 38 Short
- Length from collar 28.75
Don't have the rest of the measurements, but it is definitely small. I can almost get away with it if I don't button.