modern patio furniture  

Hmm
I've always been a fan of the IKEA PS lounge chair. And of course, the Sol Y Luna series.
You could also find some vintage Bertoias or new Panton chairs for a reasonable price.

Second that
I second the vintage Bertoia chairs. I am also a fan of the Russell Woodard Sculptura armchairs. Depending on your sense of urgency and location you may be able to come across these for a reasonable price.

I like Schultz!
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Is that a roll of dimes in...
Is that a roll of dimes in your pocket, or do you really like Schultz?

I don't like replacing fabric slings and vinyl straps
especially when the replacements carry Richard Schultz prices, so my outdoor furniture is all-steel. These chairs are on the small side, but if you fit -- Mark would -- they're comfortable for hours. Maurizio Tempestini for Salterini, c. 1952-1955:

My heart belongs to Hardoy...
My heart belongs to Hardoy butterflies.

John Caldwell for Brown Jordan
I have a set of Mai Tai chairs like these and love them.

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Great ideas! I like the bertoia suggestion. This is somewhat affordable. I love those John Caldwell chairs. For now, I'll probably go ikea and a couple bertoia chairs, unless I can find good deals on other items.

How about the Mexican...
How about the Mexican 'Acapulco' chair?
Theyve been manufacturing them since the 1950's and come in a wide variety of colors.

Love Schultz furniture
A number of years ago I bought used Schultz lounge chairs - maybe vintage not sure, $500 each and of course the slings were trashed so I figured no big deal I'll replace them. Not! The slings were quite expensive so let it slide. Now that my deck off the living room will be rebuilt in the new year we're planning on having those chairs refinished and buying new slings... nearly a grand a piece.. nuts. Those chairs are beautifully designed and so comfortable though. They go perfectly with my midcentury house.
I'm concerned the slings might be tough to put on, I hope not.

The schultz patio chair... on your balcony!
Hey Mark, your schultz chairs have the same brown color strap as the ones I purchased long ago... very familiar looking.

I have Schultz chairs/tables...
I have Schultz chairs/tables too, but agree vintage Bertoia chairs would be ideal as well.

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I have Schultz/66 on two of my patio's..one being an older set with the Knoll labels, and the other a newer set with the Richard Schultz labels (partially pictured above). The older Knoll set has a slightly different pattern to the weave of the slings that appears to be not quite as durable(nor as thick) as the newer Richard Schultz slings. But the painted (powder coat?) finish is holding up much better on the older Knoll pieces.
Carry on!

I have a set
of Russel Woodard spun fiberglass patio furniture that my wife won't let me sell. Nothing like it. Strong and strangely comfortable. Looks like it belongs in an italian soft porn movie.