What tool/battery lineup should I invest in?

I have 7 jigsaws and only 2 pairs of hands - but thanks for the link:

In order of age:

http://www.ebay.com/itm/Vintage-Porter-Cable-Model-148-Bayonet-Jig-Saw-Nice-Porter-Cable-548-USA-/231949257916

http://www.woodcentral.com/woodworking/forum/classifieds.pl/md/read/id/16485/sbj/bosch-b4050-inline-grip-jigsaw-on-ebay/

http://www.amazon.com/Bosch-JS572EL-120-Volt-Top-Handle-L-BOXX/dp/B008ELM9GK/ref=sr_1_1?ie=UTF8&qid=1464891059&sr=8-1&keywords=bosch+js572en

http://www.amazon.com/Makita-XVJ03Z-18-Volt-Lithium-Ion-Battery/dp/B00K194J8E/ref=sr_1_1?ie=UTF8&qid=1464891102&sr=8-1&keywords=BJV180Z

http://www.amazon.com/Bosch-JS572EBL-120-Volt-Barrel-Grip-L-BOXX/dp/B008ELM9BU/ref=sr_1_1?ie=UTF8&qid=1464891138&sr=8-1&keywords=JS572EBL

I have the older Bosch barrel-grip set up with a coping foot.
I hardly ever use the Makita cordless
The Bosch inline is handy sometimes
The old PC with its bayonet blades - I keep more as a collector’s item
The newer Bosch barrel grip is what I use

In New Zealand and Australia the 240v version of that LED light is known as model #R18HW-0. It was 20W 1700 lumens but one day I noticed it had jumped up to 25W 2100 lumens. No mention of a new model the secs just quietly changed.

I had a few old Stanley(W12668) lights that used quartz tubes and had a cage out in front to keep your hands or other combustibles away.Much too hot.

I also sold a set of Smith Victor Photographic lights - with barn doors and tripod stands at a garage sale. They were 1000 watt quartz units. I got a buyer who knew what they were and bought them. But before he did - I had one potential buyer asked if they could be used in a living room next to an easy chair as a reading light. My response was yes - but only if you wanted to burn books.

Right. It always bothered me that more than 90% of the electricity going into those old lights was turned into heat, not light. They were actually electric heaters, which also happened to put out some light as a side effect. Wasteful and dangerous.