I don't think you should feel bad if you decide not to adopt Louie. At least you tried and thought it through! That is more than what most people do.
Just a warning though - it's dangerous if you ask a bunch of poodle people if you should get another poodle... the answer will be YES! lol A friend of mine kept posting pics of poodle puppies that a breeder recently had. I try not to look at those, cause the temptation is too much. And now that I added another cat, I'm at my limit!
I also feel like the first visit wasn't bad. Louie respected Beau's bounadries and left him alone. People always think a neutral place for two dogs to meet is best... but I think letting them meet in your home or backyard is better. You're comfortable in your own home, so is your dog, so both of you facing a new dog will be easier. I took Leroy to meet a black standard at the poodle rescue. Leroy probably thought I was going to take him back to the rescue and leave him there. I put him in a kennel so I could look at some of the dogs - he cried so much! His separation anxiety is so bad. So he was already anxious and amped up with thinking I was leaving him. So when it came down to the interacting with the black standard, Leroy wanted nothing to do with the dog. He kept following me and his eyes were on me at all times. He did not want me to leave him and was so worried about what I'd do next. The black standard seemed interested by wanting to sniff Leroy, but that's about it. I thought the first meeting went terribly - but other people said not to place too much concern into it. I didn't know how to feel about it, but by the time I decided that I should just suck it up and bring a dog home - the black standard was already adopted out. I regretted dragging my feet and still regret it. Then came the opportunity to adopt Louis. His name is pronounced "Louie" so I'm partial to the poodle pup's name! I did not know much about Louis, only his age and gender and a VERY general description and a couple of pictures. I was very indecisive until it came down to it, I said "why not!" I brought him home and acted like he was already part of the pack. Leroy was so excited and wanted to play, but the size and personality difference did not lend much to playing, and Louis growled and snarled and put Leroy is his place. They cannot play with each other like two big dogs, but they do compliment each other very well. And I think I would get annoyed if I had two dogs that were at the same energy level ALL the time. Leroy's separation anxiety is much better with Louis, and Louis has more confidence with Leroy around - he is more willing to meet strangers.
I do wonder how the meeting would have went if you had Louie and Beau both at your place, and you ignore Beau and give all of your attention to Louie. Maybe Beau would then want to join in and try to figure out what all of the commotion is about? it is also different when you have two dogs engaging in the same schedule and "pack activites" like walking, feeding, playing, etc.
Also, my Sphynx cats don't aboslutely love each other, but tolerate each other enough to keep each other company lol. BTW, lily cd re - I can't believe you got a pic of your cats all in your lap without anyone killing each other! a lot of props to you! I don't mean to hijack this thread, but just included a pic of my three cats together! That's the closest they've been to each other with the new cat (Persian) around. I say, if three cats can get along - so can two dogs that are new to each other!