There is a huge range of clubs from super game improvement to blades. Blades are smaller on every axis than perimeter weighted. And remember, nearly every PGA player is using some non-blade perimeter weighted clubs, and some have NO blades in their bags.
To make your decision, first, buy some impact stickers. Find out if you are making consistent center impact. If you have a small impact area, you should be good to go. If you don't have impact stickers, substitute electrical tape. After 25 impacts look at your impact location. The size of a dime or a quarter? If it's a quarter stay with GI to some extent. Most manufacturers have at least five levels of clubs. Super game improvement have 2 inch wide soldes, blades have 1/4 inch wide soles.
All blades have the sweet spot closer to the hosel than on perimeter weighter irons. You'll have to make a setup adjustment to make impact there.
Blades will produce a bone jarring vibration into your arms on toe hits, much less on hosel hits. You'll also get a big vibration feedback on bladed shots and high on the clubface. Sweet spot hits will feel like your GI irons.
GI irons are cast stainless, not surgical stainless, but they don't rust easily. On blades, they are made of ferrous iron and rust badly once the chrome finish deteriorates. You need to carry a wet towel and clean the face after every swing.
If you type in "what's in my bag" or "the bag" on Google image, you'll see that the irons in many pros' bags (including Tiger Woods) look like garage sale rejects, due to rusting.
Blades deteriorate much, much more rapidly than cast stainless. A 20 year old stainless can be buffed back to new condition. Whereas a two year old set of blades can look very undesirable.
If you buy blades used, you'll probably see deterioration on the mid and short irons, especially the SW and PW. While you're getting used to ay baldes, just put electrical tape on the faces to preserve the groove edges and chrome finish.
Blades are a lot more expensive. My Mizuno JPX 800s, including bag and TM R11, cost over $2,000. Cast stainless is a lot less expensive. But, used blades, even in good condition, usually can be had for $300 to $450. But that shows you the depreciation you'll suffer if you buy the wrong set of blades and want to trade them in on another set.
Go to the PGA web site to see the price of used clubs. Edwin Watts and other purely golf retailers sell used clubs and give a playing satisfaction guarantee. If you aren't happy after 10 days, they'll give you your money or another set of clubs.