JungleLodge

http://www.muyuna.com/ - 'a labor of love of a ..young couple from lima. they offered an excellent program manual and said their tours are very flexible to our interests: MuyunaManual Their prices are listed as 3 days at $300 and five days at $470.

http://www.pacayasamiria.com.pe/ - nice bit is that it's right by the national reserve

Dear Mr.Cardenas:
Thank you for your mail. We do have availability for the 28th of march. We have   
programs from 3 days to 6 days.
Attached you will find the detail of the 3 days/ 2 nights program and our  
general conditions. The tariff for this program for three persons is US$ 330.00   
per passenger. Includes transportation from Iquitos to the lodge and
return (Overland trough the Iquitos-Nauta road and then through the MaraÒon   
river to the lodge. the travel lasts aprox. 2-2.5 hours),
lodging, meals, guided excursions to the Reserve and entrance fee. We need to  
have the program paid with 10 days in advance
  We also need to know names, nationality, passport numbers, age of the  
passengers and flight schedule. We recommed our passengers to arrive at the 
morning flight and to  departure at the night flight. We do not have canopy 
walkway.
If you have any question, do not hesitate to contact us.
Regards,
Jose Luis Harmes
Pacaya Samiria Amazon Lodge
Tel: (511) 372-5889
     (511) 9634-1286
Alameda Picaflores 190, Dpto. 101, Lima 41, Per˙
Web Site: www.pacayasamiria.com.pe

http://www.yarapariverlodge.com/ - highly recommended, research center for cornell university

however they responded with "The lowest rate we have for a three night four day  
stay is $700 USD per person. An additional night would be $200 USD per person.
This would be three persons in a private bath facility."

http://www.explorama.com/ - highest recommended or just the highest resorty type place? They responded with:

On 28 March we have the following programs available at this time:
1) CEIBA TOPS + Canopy Walkway Special (5 Days/4 Nights) - check out the
program at the following  link:
<http://www.explorama.com/normal/specials/ctcw5d4n.htm> US$555 each.  A
shorter 4 Day program may be taken (4 Days/3 Nights) using CEIBA TOPS Luxury
Lodge + Canopy Walkway at US$488 each
<http://www.explorama.com/normal/specials/ctcw4d3n.htm>
2) Explorama Lodge + Canopy Walkway Special - same as above (same rate,
also, but rustic lodge)
<http://www.explorama.com/normal/specials/elcwspecial5d4n.htm> 5 Days/4
Nights at $555 each, or
<http://www.explorama.com/normal/specials/elcwspecial4d3n.htm> 4 Days/3
Nights at $488 each.
3) CEIBA TOPS  5 Days/4 Nights - US$499 each; 4 Days/3 Nights US$396 each
4) EXPLORAMA LODGE 5 Days/4 Nights-US$455 each; 4 Days/3 Nights US$370 each.
 We will charge your card 30 days before your arrival in Iquitos.  You may  
cancel up to this date with no penalty.  After 30 days and up to 7 days before  
your arrival, you may cancel and your payment will be refunded less $100.00 
administrative fee.  No refund is available after 7 days prior to your arrival 
in Iquitos.