The EJ is better finished than the Merkurs. You won't find the flaws in an EJ that you will in the Merkurs. Excepting the Futur and Vision, the Merkurs have some QC problems with the heads of their razors.
A vintage Gillette Slim Adjustable or Super Adjustable would do you very well. They ave excellent razors and will last several lifetimes. The Gillette Super Speed is an excellent non-adjustable twist-to-open razor, also.
The Merkur Progress is more aggressive than the Gillette adjustables.
A Weishi or Ming Shi would get your feet wet without spending a lot of cash.
The Parkers have had a lot of quality problems.
Your best bet for starting out is to get a good vintage Gillette Adjustable or non-adjustable TTO razor off Ebay or countryjoescollectibles.com
The Gillette Tech is a great 3 piece DE razor. It's a mild shaver and with Derby blades, gives me fantastic shaves without irritation.
Join the forum at
www.badgerandblade.com and you will get tons of help and information.
I've been using Van der Hagen soap from Wal-Mart, Arko shave sticks from Amazon.com, Godrej Shave Rounds and Godrej shaving creams from Maharaja Shave. Look for Beyboo on badgerandblade.com.
I've been using a cheap Van der Hagen boar brush and a Tweezerman badger brush. They both have worked well. I really want to try a horse hair brush.
I can't see spending $100 on a brush. That's just me. Maybe if I tried a $100 brush I may change my mind. I see $600 brushes for sale.
I can buy a best or silvertip badger nib from the golden nib and make a custom length and size handle just for me, and only pay about $28 for the nib.