I know that Jet is a good brand. . This lathe will serve you well for bowls and similar turnings.
If I knew that I would be focussing on pens for a long time into the future, I would buy a cheaper lathe (say $300 for lathe alone ... there should be some at that price ) and spend the difference on a carbide tool and accessories like a headstock chuck, a live center, and a Jacobs chuck for the tailstock, plus a few other things like a mandrel. . Make sure the accessories are transferrable if you ever upgrade the lathe. . By that I mean considerations like the headstock chuck should have 1" x 8 TPI thread mount, the Jacobs chuck should have a Morse taper #2 mount, etc.
For pens, you certainly do not need the large "swing" of 10 inches and you are paying quite a bit for that feature.
Variable speed is a must, and preferrably right down to 15 RPM (some may disagree with such a low speed).
In that PSI package, you definitely don't need the 10 or 20 slimline pen kits, or the blanks for slimlines. . I have already mentioned the kit that I would start with and it is not a slimline. . It is the 30 Caliber Bolt Action ... much more classy, easy to make, and well worth the extra $.